The Beta Three® Electronics includes a series of meticulously engineered and manufactured professional audio equipment, such as digital signal processors, power sequencers, equalizers, and speaker management systems. This series of electronics are of premium quality, and perfectly suited to be configured in any sound reinforcement system in a wide range of applications.

EQ2231 - Stereo Graphic Equalizer
EQ2231 - Stereo Graphic Equalizer


Stereo Graphic Equalizer

EQ2231 is a 3U 30 band, constant Q Stereo Graphic Equalizer with excellent function which is suitable for many kinds of sound adjustment in the audio projects. below is the function character: 


  • EQ filter is bypassed if fader is in centre indent position
  • In the event of power failure a high quality relay switch sends input signal directly to output connectors
  • Power-on delay for soft start
  • Front Panel
  • 2 x 30 constant Q faders ±15dB control range
  • 9 x segment signal output LEDs
  • Gain control
  • High pass filter up to 250Hz
  • Low frequency shelf filter ±6dB of gain at 50Hz
  • High frequency shelf and filter ±6dB gain 14kHz
  • EQ bypass switch
  • Rear Panel
  • 2 x Balanced XLR input connectors
  • 2 x Balanced XLR output connectors
  • 6.5mm inputs and outputs connectors
  • Phoenix inputs and output connectors


Input Impedance
10kΩ Balanced and Unbalanced
Overloaded Electromotive Force
Frequency Response (±1dB)
Harmonic Distortion
<0.008% THD 20-20kHz
S/N Ratio
Max. Output Level
Output Impedance
Dynamic Range
>85dB @ 1kHz
Frequency Control
±15dB on ISO centres Q value for 4
Power Supply
115V/230V VAC 50-60Hz 30VA
Dimensions (W x D x H)
483mm (19”) x 180mm (7.1”) x 134mm (5.3”)
Net Weight (1 piece/pack)
3kg (6.6lb)
Gross Weight (1 piece/pack)
4.5kg (9.9lb)

EQ2231 Application

    EQ2231 Installation

      EQ2231 Parts

        EQ2231 Collocation



            EQ2231β3 EQ2231 Datasheet 1.0EQ2231  200KB 2022-07-06 03:01:45
            β3_EQ2231_Chinese_Manualβ3_EQ2231_Chinese_Manual 1β3_EQ2231_Chinese_Manual  644.69KB 2018-07-12 02:25:39
            β3_EQ2231_English_Manualβ3_EQ2231_English_Manual 1β3_EQ2231_English_Manual  546.35KB 2018-07-12 02:25:39